Fred has always been a player that has been criticised over the years for Manchester United for a reason for them not succeeding at the highest level, with his on-ball work never being up to the standard for an elite footballer in the Premier League.
What Fred has always done well when allowed to for club and country is bring energy to the midfield, with his ball-winning and pressing ability being top tier, while when on the ball, he can distrubute it well.
Under Ole Gunnar Solskjaer, Fred was made to play a deeper role, not allowing to play to his best abilities, but under Rangnick, where he likes his midfielders to press high up the pitch with lots of energy, Fred could stand out and be a key player in the second half of the season. He also proved his worth against Chelsea recently.